If it's a whir and not a chatter it may be the throw out bearing. Some of the TO bearings SPec has supplied with their kits have been prone to early failure.
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!